This has been in the works for awhile, but Mac AppStorm is reporting that BuySellAds is finally putting ads in OS X applications. If you have a Cocoa application, you can use an API to inject ad zones into your application. The ad zones appear in the BuySellAds marketplace just like any website, but the ads will be pulled-into your program. Bodega and the Kiwi Twitter client are both using the ads.

This is something that I have been wanting to see for some time. We have already seen a few free internet-connected applications, such as Evernote and Tweetie for Mac, supported by Fusion Ads and The Deck. It’s cool to have BuySellAds, a less exclusive network, offer a similar option to developers.

My big question is: will this work for iPhone apps? Cocoa and CocoaTouch are similar frameworks, and it would be interesting to see BuySellAds as a potential competitor to iAd and AdMob. (iAd is simply perfect for the iPhone, though. Plain banners can’t quite compete in that regard…)